Elham Abbasvand, Sirous Hassannejad, Jalil Shafagh-Kolvanagh, Saied Zehtab Salmasi
Department of Plant Eco-Physiology, University of Tabriz, Iran
Key words: Altitude, CCA analysis, Soil factors, Weed.
Altitude and soil properties can influence vegetation community and their density in rangelands. Knowing the relationships between plant species distribution with environmental factors would allow choosing the best strategy for the moderate of plants. The aim of this study was to investigate the correlation between plant species density with altitude and soil parameters in Khalatposhan rangeland in Tabriz-Iran. For this reason, grids of 20 m x 40 m were established in this rangeland, and soil samples were collected at the intersection points for physical and chemical analysis, also altitude for this points was measured by GPS. The canonical correspondence analysis (CCA) used for assesses the effects of some soil factors and altitude on grassland species and weeds distribution. Results showed that altitude as an environmental factor and pH, electrical conductivity, phosphorus and potassium as soil factors had the most effect on grassland plants and weeds distributions. Lepidium vesicarium L. had the most correlation with altitude. In contrast, increasing of altitude was caused that the density of some species likes Alyssum dasycarpum stapf and Rochelia macrocalyx Bge. reduced. Increasing of nitrogen and organic material led to increasing of some plants density likes Allium ampeloprasum L., Astragalus (Tragacantha) parrowianus, Chenopodium album L. and Salsola kali L. subsp. Tragus (L.) Nyman, but, density of Lolium rigidum Gaudin declined in these conditions. As a result of this study CCA analysis is necessary to find relationships between environmental factors and weed species distribution.
Get the original articles in Source: Volume 4, Number 6, June 2014 – JBES
Published by: International Network for Natural Sciences